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main.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#include "java.h"
#include "memory.h"
#include "log.h"
#define SEPERATOR_FILTER '|'
#define OPTION_CLASS_FILTER "--class_filter"
#define OPTION_FIELD_FILTER "--field_filter"
#define OPTION_METHOD_FILTER "--method_filter"
#define OPTION_CODE_FILTER "--code_filter"
#define OPTION_DISASSEMBLE "-a"
#define MARK_DISASSEMBLE 0x0001
#define OPTION_DECOMPILE "-c"
#define MARK_DECOMPILE 0x0002
static void generateFilter(struct AttributeFilter *, int, char *);
static void interpreteFilter(struct AttributeFilter *, int, char **);
static int interpreteFlags(int, char **);
/*
* ./cruise [-a] [-c] [--class_filter=<filterA|filterB>] [--field_filter=<filterC>] [--method_filter=<filterD>] [--code_filter=<filterE>]
*/
int
main(int argc, char** argv)
{
char *path;
struct BufferIO input;
struct AttributeFilter filter;
time_t t;
int flags;
int result;
if (argc < 2)
{
logError("Usage: %s <classfile_absolute_path>\r\n", argv[0]);
return -1;
}
path = argv[argc - 1];
memset((void *) &input, 0, sizeof (struct BufferIO));
memset((void *) &filter, 0, sizeof (struct AttributeFilter));
time(&t);
flags = interpreteFlags(argc, argv);
interpreteFilter(&filter, argc, argv);
logInfo("Classfile '%s'...\r\n", path);
if (initWithFile(&input, path) < 0)
goto bad_end;
result = parseClassfile(&input, &filter);
free(input.buffer);
fclose(input.file);
if (result < 0) goto bad_end;
else goto good_end;
good_end:
logInfo("Succeed! Time used: %.2f seconds.\r\n",
difftime(time(0), t));
return 0;
bad_end:
logInfo("Fail! Time used: %.2f seconds.\r\n",
difftime(time(0), t));
return -1;
}
static int
interpreteFlags(int argc, char **argv)
{
int i, res;
res = 0;
for (i = 1; i < argc - 1; i++)
{
if (strcmp(argv[i], OPTION_DISASSEMBLE) == 0)
{
res |= MARK_DISASSEMBLE;
}
else if (strcmp(argv[i], OPTION_DECOMPILE) == 0)
{
res |= MARK_DECOMPILE;
}
}
return res;
}
static void
generateFilter(struct AttributeFilter *attr_filter,
int index, char *str_filter)
{
char *last, *mark;
size_t len;
u4 filter, tag;
u4 *alt;
last = (char *) str_filter;
mark = strchr(str_filter, SEPERATOR_FILTER);
filter = 0;
while (mark > last)
{
len = mark - last;
tag = getAttributeTag(len, last);
filter |= tag;
last = mark + 1;
mark = strchr(last, SEPERATOR_FILTER);
}
if (filter)
{
alt = (u4 *) attr_filter;
alt[index] = filter;
}
}
// example:
// --method_filter="Code|Exceptions"
static void
interpreteFilter(struct AttributeFilter *attr_filter,
int argc, char ** argv)
{
int i, len;
char *arg;
i = 0;
while (++i < argc)
{
arg = argv[i];
len = strlen(arg);
if (strncmp(arg, OPTION_CLASS_FILTER,
sizeof (OPTION_CLASS_FILTER)) == 0)
{
arg[len - 1] = '\0';
generateFilter(attr_filter, 0,
arg + sizeof (OPTION_CLASS_FILTER) + 2);
}
else if (strncmp(arg, OPTION_FIELD_FILTER,
sizeof (OPTION_FIELD_FILTER)) == 0)
{
arg[len - 1] = '\0';
generateFilter(attr_filter, 1,
arg + sizeof (OPTION_FIELD_FILTER) + 2);
}
else if (strncmp(arg, OPTION_METHOD_FILTER,
sizeof (OPTION_METHOD_FILTER)) == 0)
{
arg[len - 1] = '\0';
generateFilter(attr_filter, 2,
arg + sizeof (OPTION_METHOD_FILTER) + 2);
}
else if (strncmp(arg, OPTION_CODE_FILTER,
sizeof (OPTION_CODE_FILTER)) == 0)
{
arg[len - 1] = '\0';
generateFilter(attr_filter, 3,
arg + sizeof (OPTION_CODE_FILTER) + 2);
}
break;
}
}